Skill directory
Agent skills
Focused instruction packs that teach a coding agent one job well. Browse the catalog and use any of them inside a RiverX project.
18,175Skills
1,902Publishers
249Official
Aceternity UIsecondsky/claude-skills100+ animated React components (Aceternity UI) for Next.js with Tailwind. Use for hero sections, parallax, 3D effects, or encountering animation, shadcn CLI integration errors.03API Authenticationsecondsky/claude-skillsSecure API authentication with JWT, OAuth 2.0, API keys. Use for authentication systems, third-party integrations, service-to-service communication, or encountering token management, security headers, auth flow errors.02API Changelog Versioningsecondsky/claude-skillsCreates comprehensive API changelogs documenting breaking changes, deprecations, and migration strategies for API consumers. Use when managing API versions, communicating breaking changes, or creating upgrade guides.01API Contract Testingsecondsky/claude-skillsVerifies API contracts between services using consumer-driven contracts, schema validation, and tools like Pact. Use when testing microservices communication, preventing breaking changes, or validating OpenAPI specifications.04API Design Principlessecondsky/claude-skillsMaster REST and GraphQL API design principles to build intuitive, scalable, and maintainable APIs that delight developers. Use when designing new APIs, reviewing API specifications, or establishing API design standards.01API Error Handlingsecondsky/claude-skillsImplements standardized API error responses with proper status codes, logging, and user-friendly messages. Use when building production APIs, implementing error recovery patterns, or integrating error monitoring services.02API Filtering Sortingsecondsky/claude-skillsBuilds flexible API filtering and sorting systems with query parameter parsing, validation, and security. Use when implementing search endpoints, building data grids, or creating dynamic query APIs.01API Gateway Configurationsecondsky/claude-skillsConfigures API gateways for routing, authentication, rate limiting, and request transformation in microservice architectures. Use when setting up Kong, Nginx, AWS API Gateway, or Traefik for centralized API management.01API Paginationsecondsky/claude-skillsImplements efficient API pagination using offset, cursor, and keyset strategies for large datasets. Use when building paginated endpoints, implementing infinite scroll, or optimizing database queries for collections.01API Rate Limitingsecondsky/claude-skillsImplements API rate limiting using token bucket, sliding window, and Redis-based algorithms to protect against abuse. Use when securing public APIs, implementing tiered access, or preventing denial-of-service attacks.01API Reference Documentationsecondsky/claude-skillsCreates professional API documentation using OpenAPI specifications with endpoints, authentication, and interactive examples. Use when documenting REST APIs, creating SDK references, or building developer portals.01API Response Optimizationsecondsky/claude-skillsOptimizes API performance through payload reduction, caching strategies, and compression techniques. Use when improving API response times, reducing bandwidth usage, or implementing efficient caching.01API Security Hardeningsecondsky/claude-skillsREST API security hardening with authentication, rate limiting, input validation, security headers. Use for production APIs, security audits, defense-in-depth, or encountering vulnerabilities, injection attacks, CORS issues.02API Testingsecondsky/claude-skillsHTTP API testing for TypeScript (Supertest) and Python (httpx, pytest). Test REST APIs, GraphQL, request/response validation, authentication, and error handling.01API Versioning Strategysecondsky/claude-skillsImplements API versioning using URL paths, headers, or query parameters with backward compatibility and deprecation strategies. Use when managing multiple API versions, planning breaking changes, or designing migration paths.01App Store Deploymentsecondsky/claude-skillsPublishes mobile applications to iOS App Store and Google Play with code signing, versioning, and CI/CD automation. Use when preparing app releases, configuring signing certificates, or setting up automated deployment pipelines.01Architecture Patternssecondsky/claude-skillsImplement proven backend architecture patterns including Clean Architecture, Hexagonal Architecture, and Domain-Driven Design. Use when architecting complex backend systems or refactoring existing applications for better maintainability.01Better Authsecondsky/claude-skillsSkill for integrating Better Auth - comprehensive TypeScript authentication framework for Cloudflare D1, Next.js, Nuxt, and 15+ frameworks. Use when adding auth, encountering D1 adapter errors, or implementing OAuth/2FA/RBAC features.038Bun Bundlersecondsky/claude-skillsThis skill should be used when the user asks about "bun build", "Bun.build", "bundling with Bun", "code splitting", "tree shaking", "minification", "sourcemaps", "bundle optimization", "esbuild alternative", "building for production", "bundling TypeScript", "bundling for browser", "bundling for Node", or JavaScript/TypeScript bundling with Bun.02Bun Cloudflare Workerssecondsky/claude-skillsThis skill should be used when the user asks about "Cloudflare Workers with Bun", "deploying Bun to Workers", "wrangler with Bun", "edge deployment", "Bun to Cloudflare", or building and deploying applications to Cloudflare Workers using Bun.01Bun Dockersecondsky/claude-skillsUse for Docker with Bun, Dockerfiles, oven/bun image, containerization, and deployments.01Bun Drizzle Integrationsecondsky/claude-skillsUse when integrating Drizzle ORM with Bun's SQLite driver for type-safe schema definitions and migrations.01Bun Hono Integrationsecondsky/claude-skillsUse when building APIs with Hono framework on Bun, including routing, middleware, REST APIs, context handling, or web framework features.01Bun Hot Reloadingsecondsky/claude-skillsUse when implementing hot reloading with Bun (--hot, --watch), HMR, or automatic code reloading during development. Covers watch mode, hot mode, and HTTP server reload.01Bun HTTP Serversecondsky/claude-skillsUse when building HTTP servers with Bun.serve, handling requests/responses, implementing routing, creating REST APIs, or configuring fetch handlers.01Bun Package Managersecondsky/claude-skillsBun package manager commands (install, add, remove, update), workspaces, lockfiles, npm/yarn/pnpm migration. Use for dependency management with Bun.02Bun Runtimesecondsky/claude-skillsUse for Bun runtime, bunfig.toml, watch/hot modes, env vars, CLI flags, and module resolution.04Bun Sqlitesecondsky/claude-skillsUse for bun:sqlite, SQLite operations, prepared statements, transactions, and queries.01Bun Sveltekitsecondsky/claude-skillsUse when building or running SvelteKit apps on Bun, including SSR, adapters, and Bun-specific APIs01Bun Tanstack Startsecondsky/claude-skillsTanStack Start full-stack React framework with Bun runtime. Use for TanStack Router, server functions, vinxi, or encountering SSR, build, preset errors.01Bun Test Basicssecondsky/claude-skillsUse for bun:test syntax, assertions, describe/it, test.skip/only/each, and basic patterns.01Bun Test Coveragesecondsky/claude-skillsUse for test coverage with Bun, --coverage flag, lcov reports, thresholds, and CI integration.01Bun Test Mockingsecondsky/claude-skillsUse for mock functions in Bun tests, spyOn, mock.module, implementations, and test doubles.01Bun Workerssecondsky/claude-skillsUse for Web Workers in Bun, worker_threads, parallel processing, and background tasks.01Claude Automation Recommendersecondsky/sap-skillsAnalyze a codebase and recommend Claude Code automations (hooks, subagents, skills, plugins, MCP servers). Use when user asks for automation recommendations, wants to optimize their Claude Code setup, mentions improving Claude Code workflows, asks how to first set up Claude Code for a project, or wants to know what Claude Code features they should use.06Claude Code Bash Patternssecondsky/claude-skillsClaude Code Bash tool patterns with hooks, automation, git workflows. Use for PreToolUse hooks, command chaining, CLI orchestration, custom commands, or encountering bash permissions, command failures, security guards, hook configurations.014Claude Hook Writersecondsky/claude-skillsExpert guidance for writing secure, reliable, and performant Claude Code hooks - validates design decisions, enforces best practices, and prevents common pitfalls. Use when creating, reviewing, or debugging Claude Code hooks.07Claude Md Improversecondsky/sap-skillsAudit and improve CLAUDE.md files in repositories. Use when user asks to check, audit, update, improve, or fix CLAUDE.md files. Scans for all CLAUDE.md files, evaluates quality against templates, outputs quality report, then makes targeted updates. Also use when the user mentions "CLAUDE.md maintenance" or "project memory optimization".04Cloudflare Managersecondsky/claude-skillsComprehensive Cloudflare account management for deploying Workers, KV Storage, R2, Pages, DNS, and Routes. Use when deploying cloudflare services, managing worker containers, configuring KV/R2 storage, or setting up DNS/routing. Requires CLOUDFLARE_API_KEY in .env and Bun runtime with dependencies installed.02Code Reviewsecondsky/claude-skillsCode review practices with technical rigor and verification gates. Use for receiving feedback, requesting code-reviewer subagent reviews, or preventing false completion claims in pull requests.04Csrf Protectionsecondsky/claude-skillsImplements CSRF protection using synchronizer tokens, double-submit cookies, and SameSite attributes. Use when securing web forms, protecting state-changing endpoints, or implementing defense-in-depth authentication.02Defense In Depth Validationsecondsky/claude-skillsValidate at every layer data passes through to make bugs impossible. Use when invalid data causes failures deep in execution, requiring validation at multiple system layers.01Dependency Upgradesecondsky/claude-skillsSecure dependency upgrades with supply chain protection, cooldowns, and staged rollout. Use when upgrading deps, configuring security policies, or preventing supply chain attacks.019Dependency Upgradesecondsky/sap-skillsSecure dependency upgrades with supply chain protection, cooldowns, and staged rollout. Use when upgrading deps, configuring security policies, or preventing supply chain attacks.019Design System Creationsecondsky/claude-skills| Creates comprehensive design systems with typography, colors, components, and documentation for consistent UI development. Use when establishing design standards, building component libraries, or ensuring cross-team consistency.01Drizzle Orm D1secondsky/claude-skills| Type-safe ORM for Cloudflare D1 databases using Drizzle. Use when: building D1 database schemas, writing type-safe SQL queries, managing migrations with Drizzle Kit, defining table relations, implementing prepared statements, using D1 batch API, or encountering D1_ERROR, transaction errors, foreign key constraint failures, or schema inference issues.020Frontend Designsecondsky/claude-skillsCreate distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, or applications. Generates creative, polished code that avoids generic AI aesthetics.01Health Check Endpointssecondsky/claude-skillsHealth check endpoints for liveness, readiness, dependency monitoring. Use for Kubernetes, load balancers, auto-scaling, or encountering probe failures, startup delays, dependency checks, timeout configuration errors.02
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